This guide to designing with animals, plants, and other species offers a glossary that explores their roles and interconnections in addressing climatic and ecological challenges. It examines individual species and interspecies collaboration, providing tools to move beyond homocentric design toward a richer, more nature-integrated approach. Organized by species and interconnected themes, the 60 entries delve into the spatial needs and behaviors of creatures like beavers, termites, and fungi, alongside interviews with experts and case studies from past and present design projects.